Page 274 - Air Pollution Control Engineering

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Wet and Dry Scrubbing 253

Administration = 0.02(TCC)
Administration = $

Capital Recovery = 0.1628(TCC)
Capital Recovery = $

D. The total annual cost is determined by summing the annual direct and annual indirect
costs:

Total annual costs = Total direct annual cost + Total indirect annual costs
Total annual costs = Total DAC + Total IAC
Total annual costs = $
E. Cost Update

Please refer to the book entitled Advanced Air and Noise Pollution Control (also pub-
lished by Humana Press, Totowa, NJ). Note Chemical Engineering Indices and New
Record Cost Indices in refs. 29 and 30.

Example 16
In this example, the total costs of the Venturi scrubber (see Fig. 1c) sized in Example 14
are developed. Recall that this scrubber was deemed to be the correct pollution control
technology to treat the pollutants present in the emission stream of a municipal incinera-
tor (see Table 15). These costs will include the purchase, direct and indirect annual, and
capital costs for the scrubber system. As per Example 15, a step-by-step procedure is
explained as follows

Solution

A. Purchase and Total Capital Costs
The cost of the Venturi scrubber is determined using Table 16, which yields the figure of
$66,000 for a Venturi scrubber treating 110,000 acfm (Q ). The purchase cost (PC) may
e,a
be estimated from Table 16 and the equipment cost (EC) was discussed previously.
The Venturi scrubber cost (VSC) can be estimated from Table 16:

VSC = $11.10(Q ) 0.7513 = $11.10 (110,000) 0.7513
e,a
VSC = $68,064 ~ $68,000
The material construction for scrubber is 316 SS and the multiplier is 3.2. The
upgrade VSC is
VSC = 3.2($68,000) = $217,600

Auxiliary equipment (Aex) is assumed to cost $5400. Note that the cost of instru-
mentation for the Venturi scrubber is included in this estimation.

EC = VSC + Aex
EC = $217,600 + $5,400 = $223,000
Sales tax = 0.03($223,000) = $6,390
Freight = 0.05($223,000) = $11,200
Purchased equipment cost, PEC = $241,000
The PEC = $241,000 (see Table 18 for detailed calculations)